Changing Of Ball Seat In Operating Unit - Hardi LX-MB Series Instruction Book

Changing of ball seat in operating unit

If problems with on/off valve occurs (dripping nozzles when on/off
valve is closed), the ball and ball seat should be checked.
Remove the 2 bolts fixing the
on/off-pressure valve unit to
the bracket, unscrew the
union nut A and pull the on/
off-pressure valve away from
A
the distribution valves.
Check the ball for sharp
edges and scratches and
check the ball seat for
cracks and wear - replace if necesary.
Nozzle tubes and fittings
Poor seals are usually caused by;
• missing O-rings or gaskets
• damaged or incorrectly seated O-rings
• dry or deformed O-rings or gaskets
• foreign bodies
Therefore, in case of leaks: DO NOT overtighten.
Disassemble, check condition and position of O-
ring or gasket, clean lubricate and reassemble.
For radial connections only hand tighten them.
Lubricate ALL THE WAY ROUND before fitting.
For face connections, a little me-
chanical leverage may be used.
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